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From: dave_93_98 on 3 Feb 2005 21:18
Hi,
I am receiving a 12541 error trying to connect to an oracle listener on
redhat linux.

When I do an lsnrctl status it shows that the listener is running (I
also did an lsof -i to verify that the port was being used by tnslsnr).
When I connect via sqlplus and run show parameter service_name it
displays my SID.hostname. I have verified that my firewall is not an
issue (shouldn't be because I cannot even do a tnsping on this machine)
and that the hostname resolves correctly.

sqlnet.ora ----------
NAMES.DIRECTORY_PATH= (TNSNAMES, HOSTNAME, ONAMES)

I have commented out NAMES.DEFAULT_DOMAIN = hostname when it is
uncommented it gives a failed to resolve name error.

Listener.ora --------
# LISTENER.ORA Network Configuration File:
/u01/app/oracle/product/8.1.7/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = 1521))
)
)
)

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/8.1.7)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = SID.hostname)
(ORACLE_HOME = /u01/app/oracle/product/8.1.7)
(SID_NAME = SID)
)
)

tnsnames.ora ----------
# TNSNAMES.ORA Network Configuration File:
/u01/app/oracle/product/8.1.7/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

FW =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = SID.hostname)
(SRVR = DEDICATED)
)
)

INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = SID.hostname)
(PRESENTATION = http://admin)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)


Any help would be greatly appreciated.

Thanks,
Dave

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